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| author | Jakub Kicinski <kuba@kernel.org> | 2022-05-19 03:44:17 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-05-20 04:44:51 +0300 |
| commit | 1172aa6e4a195aaf5941ae89a93068cb9dd07b47 (patch) | |
| tree | fb24447faff5beeea0b0fb1b22a327fed729a92d | |
| parent | dbbc7d04c549a43ad343c69e17b27a57e2102041 (diff) | |
| download | linux-1172aa6e4a195aaf5941ae89a93068cb9dd07b47.tar.xz | |
net: ipa: don't proceed to out-of-bound write
GCC 12 seems upset that we check ipa_irq against array bound
but then proceed, anyway:
drivers/net/ipa/ipa_interrupt.c: In function ‘ipa_interrupt_add’:
drivers/net/ipa/ipa_interrupt.c:196:27: warning: array subscript 30 is above array bounds of ‘void (*[30])(struct ipa *, enum ipa_irq_id)’ [-Warray-bounds]
196 | interrupt->handler[ipa_irq] = handler;
| ~~~~~~~~~~~~~~~~~~^~~~~~~~~
drivers/net/ipa/ipa_interrupt.c:42:27: note: while referencing ‘handler’
42 | ipa_irq_handler_t handler[IPA_IRQ_COUNT];
| ^~~~~~~
Reviewed-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20220519004417.2109886-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ipa/ipa_interrupt.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/ipa/ipa_interrupt.c b/drivers/net/ipa/ipa_interrupt.c index b35170a93b0f..307bed2ee707 100644 --- a/drivers/net/ipa/ipa_interrupt.c +++ b/drivers/net/ipa/ipa_interrupt.c @@ -191,7 +191,8 @@ void ipa_interrupt_add(struct ipa_interrupt *interrupt, struct ipa *ipa = interrupt->ipa; u32 offset; - WARN_ON(ipa_irq >= IPA_IRQ_COUNT); + if (WARN_ON(ipa_irq >= IPA_IRQ_COUNT)) + return; interrupt->handler[ipa_irq] = handler; @@ -208,7 +209,8 @@ ipa_interrupt_remove(struct ipa_interrupt *interrupt, enum ipa_irq_id ipa_irq) struct ipa *ipa = interrupt->ipa; u32 offset; - WARN_ON(ipa_irq >= IPA_IRQ_COUNT); + if (WARN_ON(ipa_irq >= IPA_IRQ_COUNT)) + return; /* Update the IPA interrupt mask to disable it */ interrupt->enabled &= ~BIT(ipa_irq); |